コード例 #1
0
ファイル: thumb.php プロジェクト: fishling/chatPro
function getThumbImage($filename, $width = 100, $height = 'auto', $type = 0, $replace = false)
{
    $UPLOAD_URL = '';
    $UPLOAD_PATH = '';
    $filename = str_ireplace($UPLOAD_URL, '', $filename);
    //将URL转化为本地地址
    $info = pathinfo($filename);
    $oldFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '.' . $info['extension'];
    $thumbFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '_' . $width . '_' . $height . '.' . $info['extension'];
    $oldFile = str_replace('\\', '/', $oldFile);
    $thumbFile = str_replace('\\', '/', $thumbFile);
    $filename = ltrim($filename, '/');
    $oldFile = ltrim($oldFile, '/');
    $thumbFile = ltrim($thumbFile, '/');
    //兼容SAE的中心裁剪缩略
    if (strtolower(C('PICTURE_UPLOAD_DRIVER')) == 'sae') {
        $storage = new SaeStorage();
        $thumbFilePath = str_replace(C('UPLOAD_SAE_CONFIG.rootPath'), '', $thumbFile);
        if (!$storage->fileExists(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath)) {
            $f = new SaeFetchurl();
            $img_data = $f->fetch($oldFile);
            $img = new SaeImage();
            $img->setData($img_data);
            $info_img = $img->getImageAttr();
            if ($height == "auto") {
                $height = $info_img[1] * $height / $info_img[0];
            }
            $w = $info_img[0];
            $h = $info_img[1];
            /* 居中裁剪 */
            //计算缩放比例
            $w_scale = $width / $w;
            if ($w_scale > 1) {
                $w_scale = 1 / $w_scale;
            }
            $h_scale = $height / $h;
            if ($h_scale > $w_scale) {
                //按照高来放缩
                $x1 = (1 - 1.0 * $width * $h / $w / $height) / 2;
                $x2 = 1 - $x1;
                $img->crop($x1, $x2, 0, 1);
                $img_temp = $img->exec();
                $img1 = new SaeImage();
                $img1->setData($img_temp);
                $img1->resizeRatio($h_scale);
            } else {
                $y1 = (1 - 1 * 1.0 / ($width * $h / $w / $height)) / 2;
                $y2 = 1 - $y1;
                $img->crop(0, 1, $y1, $y2);
                $img_temp = $img->exec();
                $img1 = new SaeImage();
                $img1->setData($img_temp);
                $img1->resizeRatio($w_scale);
            }
            $img1->improve();
            $new_data = $img1->exec();
            // 执行处理并返回处理后的二进制数据
            if ($new_data === false) {
                return $oldFile;
            }
            // 或者可以直接输出
            $thumbed = $storage->write(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath, $new_data);
            $info['width'] = $width;
            $info['height'] = $height;
            $info['src'] = $thumbed;
            //图片处理失败时输出错误码和错误信息
        } else {
            $info['width'] = $width;
            $info['height'] = $height;
            $info['src'] = $storage->getUrl(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath);
        }
        return $info;
    }
    //原图不存在直接返回
    if (!file_exists($UPLOAD_PATH . $oldFile)) {
        @unlink($UPLOAD_PATH . $thumbFile);
        $info['src'] = $oldFile;
        $info['width'] = intval($width);
        $info['height'] = intval($height);
        return $info;
        //缩图已存在并且  replace替换为false
    } elseif (file_exists($UPLOAD_PATH . $thumbFile) && !$replace) {
        $imageinfo = getimagesize($UPLOAD_PATH . $thumbFile);
        $info['src'] = $thumbFile;
        $info['width'] = intval($imageinfo[0]);
        $info['height'] = intval($imageinfo[1]);
        return $info;
        //执行缩图操作
    } else {
        $oldimageinfo = getimagesize($UPLOAD_PATH . $oldFile);
        $old_image_width = intval($oldimageinfo[0]);
        $old_image_height = intval($oldimageinfo[1]);
        if ($old_image_width <= $width && $old_image_height <= $height) {
            @unlink($UPLOAD_PATH . $thumbFile);
            @copy($UPLOAD_PATH . $oldFile, $UPLOAD_PATH . $thumbFile);
            $info['src'] = $thumbFile;
            $info['width'] = $old_image_width;
            $info['height'] = $old_image_height;
            return $info;
        } else {
            if ($height == "auto") {
                $height = $old_image_height * $width / $old_image_width;
            }
            if ($width == "auto") {
                $width = $old_image_width * $width / $old_image_height;
            }
            if (intval($height) == 0 || intval($width) == 0) {
                return 0;
            }
            require_once 'ThinkPHP/Library/Vendor/phpthumb/PhpThumbFactory.class.php';
            $thumb = PhpThumbFactory::create($UPLOAD_PATH . $filename);
            if ($type == 0) {
                $thumb->adaptiveResize($width, $height);
            } else {
                $thumb->resize($width, $height);
            }
            $res = $thumb->save($UPLOAD_PATH . $thumbFile);
            $info['src'] = $UPLOAD_PATH . $thumbFile;
            $info['width'] = $old_image_width;
            $info['height'] = $old_image_height;
            return $info;
            //内置库缩略
            /*  $image = new \Think\Image();
                $image->open($UPLOAD_PATH . $filename);
                //dump($image);exit;
                $image->thumb($width, $height, $type);
                $image->save($UPLOAD_PATH . $thumbFile);
                //缩图失败
                if (!$image) {
                    $thumbFile = $oldFile;
                }
                $info['width'] = $width;
                $info['height'] = $height;
                $info['src'] = $thumbFile;
                return $info;*/
        }
    }
}